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Dresserite

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Big Photo

Francon quarry, Montréal, Québec, Canada
© Leon Hupperichs

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Formula:
BaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · H
 
2
O
System:OrthorhombicColour:White
Lustre:Vitreous, SilkyHardness:2½ - 3
Member of:Dresserite Group
Name:
For John Alexander Dresser (1866-1954), Canadian geologist for contributions for the Monteregian Hills.
This page provides mineralogical data about Dresserite.

Classification of Dresserite

IMA status:Approved 1968
Strunz 8th edition ID:5/E.08-60
Nickel-Strunz 10th (pending) edition ID:5.DB.10

5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
B : With large and medium-sized cations
Dana 8th edition ID:16b.2.1.2

16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
2 : AmBn(XO3)pZqxH2O & with (m+n):p = 3:2
Hey's CIM Ref.:11.7.12

11 : Carbonates
7 : Carbonates of Al
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Type Occurrence of Dresserite

Type Locality:Francon quarry, Montréal, Québec, Canada
Place of Conservation of Type Material:Canadian Museum of Nature, Ottawa
Year of Discovery:1969
Geological Setting of type material:Vugs in alkalic sill in limestone.
Associated Minerals at type locality:
WeloganiteQuartzDawsoniteAlbite-Anorthite Series

Physical Properties of Dresserite

Lustre:Vitreous, Silky
Diaphaneity (Transparency):Transparent
Colour:White
Streak:White
Hardness (Mohs):2½ - 3
Density (measured):2.96(2) g/cm3
Density (calculated):3.06 g/cm3

Crystallography of Dresserite

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:a = 9.27Å, b = 16.83Å, c = 5.63Å
Ratio:a:b:c = 0.551 : 1 : 0.335
Unit Cell Volume:V 878.36 ų (Calculated from Unit Cell)
Z:2
Morphology:Tapering acicular crystals, typically in divergent spherical and hemispherical aggregates to 3mm.

Optical Data of Dresserite

Type:Biaxial (-)
RI values: nα = 1.518 nγ = 1.601
2V:Measured: 30° to 40°
Maximum Birefringence:δ = 0.083

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:relatively strong

Chemical Properties of Dresserite

Formula:
BaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · H
 
2
O
Essential elements:Al, Ba, C, H, O
All elements listed in formula:Al, Ba, C, H, O

Relationship of Dresserite to other Species

Member of:Dresserite Group
Other Members of Group:

- +
Hydrodresserite
BaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · 3H
 
2
O
Strontiodresserite
(Sr,Ca)Al
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
5.DB.05Alumohydrocalcite
CaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · 3H
 
2
O
5.DB.05Nasledovite
PbMn
 
3
Al
 
4
(CO
 
3
)
 
4
(SO
 
4
)O
 
5
 · 5H
 
2
O
5.DB.05Para-alumohydrocalcite
CaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · 6H
 
2
O
5.DB.05UM1977-02-CO:AlCaH
Ca
 
3
Al
 
2
(CO
 
3
)
 
3
O
 
6
 · 32H
 
2
O
5.DB.10Dundasite
PbAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · H
 
2
O
5.DB.10Montroyalite
Sr
 
4
Al
 
8
(CO
 
3
)
 
3
(OH,F)
 
26
 · 10-11H
 
2
O
5.DB.10Strontiodresserite
(Sr,Ca)Al
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · H
 
2
O
5.DB.10Petterdite
PbCr
3+
2
(CO
 
3
)
 
2
(OH)
 
4
 · H
 
2
O
5.DB.10Kochsándorite
CaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · H
 
2
O
5.DB.15Hydrodresserite
BaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · 3H
 
2
O
5.DB.20Schuilingite-(Nd)
PbCu(Nd,Gd,Sm,Y)(CO
 
3
)
 
3
(OH) · 1.5H
 
2
O
5.DB.25Sergeevite
Ca
 
2
Mg
 
11
(CO
 
3
)
 
13
 · 10H
 
2
O
5.DB.30Szymańskiite
Hg
 
16
(Ni,Mg)
 
6
(CO
 
3
)
 
12
(OH)
 
12
 · 11H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
11.7.1Scarbroite
Al
 
5
(CO
 
3
)(OH)
 
13
 · 5H
 
2
O
11.7.2Hydroscarbroite
Al
 
14
(CO
 
3
)
 
3
(OH)
 
36
 · nH
 
2
O
11.7.3Dawsonite
NaAlCO
 
3
(OH)
 
2
11.7.4Hydrotalcite
Mg
 
6
Al
 
2
(CO
 
3
)(OH)
 
16
 · 4H
 
2
O
11.7.5Manasseite
Mg
 
6
Al
 
2
(CO
 
3
)(OH)
 
16
 · 4H
 
2
O
11.7.6Indigirite
Mg
 
2
Al
 
2
(CO
 
3
)
 
4
(OH)
 
2
 · 15H
 
2
O
11.7.7Alumohydrocalcite
CaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · 3H
 
2
O
11.7.8Para-alumohydrocalcite
CaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · 6H
 
2
O
11.7.9Tunisite
NaCa
 
2
Al
 
4
(CO
 
3
)
 
4
(OH)
 
8
Cl
11.7.10Wermlandite
Mg
 
7
(Ca,Mg)(Al,Fe)
 
2
(SO
 
4
)
 
2
(OH)
 
18
 · 12H
 
2
O
11.7.11Montroyalite
Sr
 
4
Al
 
8
(CO
 
3
)
 
3
(OH,F)
 
26
 · 10-11H
 
2
O
11.7.13Hydrodresserite
BaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · 3H
 
2
O
11.7.14Strontiodresserite
(Sr,Ca)Al
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · H
 
2
O

Other Names for Dresserite

Synonyms:
IMA1968-027
Other Languages:
German:Dresserit
Spanish:Dresserita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Dresserite

Reference List:

- +
Jambor, J. L., Fong, D. G. and Sabina, A. P. (1969): Dresserite, the new barium analogue of dundasite. Canadian Mineralogist: 10, 84-89.

American Mineralogist: 55: 1447.

Internet Links for Dresserite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Dresserite details from Handbook of Mineralogy (PDF)
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    • Localities for Dresserite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Canada
     
    • Québec
      • Montréal
    		Canadian Mineralogist (1969): 10: 84-89.
    Mineral and/or Locality
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